Pneumatic earth scraper



lama 2%, 192.33.

L. R. RHODES PNEUMATIC EARTH SGRAPER Filed Nov. 10 1920 Patented June 26, 1923.

LEIGH RANDALL RHODES, on ctnvnnann, OHIO.

I rnnunmrrc nears scsarne.

To all whom it mwy concern:

Be it known that I, LEIGH RA DALL.

:trronns, a citizen of the United States, residing at Cleveland, in the county of Guyahoga'and State of Ohio, have invented certain new and useful Improvements in Pneumatic Earth Scrapers, of which the follow ing is a specification.

The present invention relates to an earth cuttlng or excavating tool, and has for its object to provide a portable device of this character which is power driven and embodies novel features of construction where by it can be used to advantage under many conditions where it would not be practical to employ a larger device, as when tunneling struction, which can be operated without difiiculty in close quarters, which can' be used effectively upon earth whichis so hard that it could 'onlybe operated upon with" difficulty by a'hand tool, and whichwill re sultin increased efficiency and lower costs in many tunneling or excavating jobs where hard earth is encountered and workwlth a 30 hand tool would be very difiicult. With these and other objects in View the invention consists in certain combinations, arrangements and associations of the parts, as will more fully appear as the description proceeds, the novelfeatures thereof being pointed out in the appended claims.

For a full understanding of the invention reference is to be had to the following description and accompanying drawings, in which 1 Figure 1 is a perspective view'of a power driven earth cutting implement which is constructed in accordancewith the invention;

Figure 2 is a side elevation thereof, showing the same in operationy i Figure 3 is a side elevation-of the implement with portions broken away and shown in section to illustrate more clearly the de tails of construction;

Figure 4 is a transverse sectional view on the line 4tl of Figure 2, looking in the direction of the arrows; and

Figure 5 is a transverse sectional view on the line 55 of Figure 3, looking in the direction of the arrows.

Application filed November 10, 1920. Serial No. 423,047.

Corresponding and like parts are referred. to in, the following description and indi-M cated in'all ofthe views of the drawing by like reference characters."

Referring to the drawing, which illustrates one of many possible embodiments of the inventiom, the numeral 1 designates a inife blade which may have one edge thereof sharpened, as indicated at P, and which is bent longitudinally so as to have a bowed formation. Side bars 2 are secured to the ends of the knife 1 and project laterally therefrom in a plane at substantially right angles to that of the bladegsaid side bars converging toward each other and being connected at their converging ends by a cross head 3. An anvil or head 4 is carried by the'cross head 3 and engagedby a power driving tool such as the pneumatichammer 5. This pneumatic hammer is shown as arranged in the plane of the frame of the tool, and the said frame is disposed at substantially right angles to the plane of the bowed blade 1, although the blade cuts in the direction of the frame. The pneumatic hammer may be held in position by cross bars 6 whichconnect the side bars 2 and are arrangedupon opposite sides of the hammer. These cross bars thus serve both to retain the hammer in. position and to strengthen and reinforce the frame. The mouth of thehammer fits loosely over the anvil 4] so that the reciprocating piston ele ment 7 ofthe hammer will strike successive blows upon the anvil when the hammer is in operation. A lug 8 is shown as project-- inp; laterallyfromthe hammer and arranged to engage onset the cross bars 6 for cooperation therewith to hold the hammer in. proper position upon the anvil 4 when the tool is in operation. The cross head 3 may be provided with a handle 9 for convenience in handling and manipulating the tool when placing it in working position or removing it therefrom. The usual compressed I air supply pipe 10 is shown connected to the handle of the pneumatic hammer in the usual manner.

. In the operation of the tool the curved or bowed blade 1 which projects laterally from the frame is caused to enter the earth substantially as indicated by Figure 2, with the frame arranged adjacent tothe surface of the earth. When the pneumatic hammer is operated the blows thereof will forcibly move the blade through theearth in the direction of the frame and by manually manipulating the frame theblade canbe-lrept in proper working position and guided through the earth in the desired manner. A

power driven tool of this character will operate quickly and economically upon earth formations which are so hard that work with a hand toolwould be very slow and difficult. weight and compact in its design so that it can be easily carried from place to place and.

used to advantage in close quarters where it would not be possible to use a large tool. The tool will. be found especially valuable in tunneling operations, although it may be used toadvantage wherever a small power tion into practice and that I do not restrict myselfto the exact construction illustrated by the drawing;

Ha ving thus-described my invention, what I claim as new and. desire to secure by Letters Patent is I 1. A portable hand controlled earth excavating device of the character described, including an earth scraping blade, a frame carrying the blade and providing a. means fill for pulling the blade through the earth, and

a power operating driving element mounted upon and carried by the frame. l

2. A portable hand controlled earth cutter including a frame, a blade projecting laterally from the frame and operating in the direction parallel thereto, and a power operated driving element mounted upon the frame, the frame and associated parts being adapted to be manually supported and handled as a unit.

3. An earth cutter including a flat frame, a blade projecting laterally from the frame and operating in the direction thereof, an anvil element upon the frame, and a power hammer engaging the anvil element and mounted upon the frame.

.45. An earth cutter including a bowed Furthermore, the tool'is light in blade, a frame carrying the bowed blade anl arranged in a plane at an angle to the plane tiereof, and a power hammer mounted upon the frame.

5. in earth cutter including a bowed blade, a flat frame carrying the blade and arranged in a plane at an angle thereto, an anvil element upon the flat frame, and a power hammerengagi ng the anvil element and mounted upon theflat frame in the plane thereof. I

6. An earth cutter including a bowed blade, side bars connected to the ends of the bowed blade, a cross head connecting the side bars, an anvil element upon the cross head, a powerhammcr engaging the anvil element, and means for supporting the power hammer between the side bars.

7. An v earth. cutter including a bowed blade, side bars connected to the ends of, the bowed blade, at cross head connecting the side bars a handle at the ends of the side bars, an anvil element on the cross head, a power hammer engaging the anvil element,,and cross bars connecting the side bars and holding thepower hammer in position.

8. A portable hand controlled earth cutter including a power hammer, and a blade offset laterally from the power hammer and operating parallel thereto, the power hammer and blade being mounted to be manually supportedand handled as a unit.

9. A portable hand controlledearth cutter, including an earth cutting blade havmg a cuttmg'edge of comparatively large di-f mensions so as to work quickly throughearth formations, and a power hammer for the blade, the power hammer and blade being mounted to be manually supported and handled asa unit. l

10. A portablehand controlled earth cutter includinga frame, a bowed blade-having the curved portion thereof offset laterally from the frame, and power driving means on the frame, the frame and associated parts belng adapted to be'manually supported and handled as a unit.

11; A portable hand controlled earth cutter, including a bowed blade having a curved edge portion, a portable fra1ne=sup porting the blade, and power drive means on the frame, the frame and. associated parts being adapted to be manually supported and handled as a unit. Y

In testimony whereof I aflix my signature.

LEIGH RANDALL RHODES. 

